ABSTRACT
Extruded 3D models An extruded model is created by extruding a ‘shape’ upwards or downwards from a horizontal plane – called the ELEVATION plane. The actual extruded height (or depth) is called the THICKNESS and can be positive or negative relative to the set elevation plane. This extruded thickness is always perpendicular to the elevation plane. The extrusion is in the Z direction of the UCS icon – more on this later. The basic extruded terminology is displayed in Fig. 2.1.
